Question

Find the measurement of third side of triangle
1. 100⁰,20⁰
2. 120⁰ , 30⁰
3. 90⁰,40⁰​

Answer 1

Answer:

$\huge \bf \: given$

Find the measurement of third side of triangle

1. 100⁰,20⁰

2. 120⁰ , 30⁰

3. 90⁰,40⁰

$\huge \bf \: solution$

As we know that sum of sides of triangle is 180⁰

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Question 1

Let the third angle be x

$100 + 20 + x = 180$

$120 + x = 180$

$x = 180 - 120$

$x = 60 \degree$

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Question 2

Let the third angle be x

$120 + 30 + x = 180$

$150 + x = 180$

$x = 180 - 150$

$x = 30 \degree$

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Question 3

Let the third angle be x

$90 + 40 + x = 180$

$130 + x = 180$

$x = 180 - 130$

$x = 50 \degree$